package com.itheima.controller;

import com.itheima.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {
    @Value("${reggie.path}")
    private String path;
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
        log.info("file是{}",file);
        String originalFilename = file.getOriginalFilename();
        String suffix=originalFilename.substring(originalFilename.lastIndexOf('.'));
        String name=UUID.randomUUID().toString()+suffix;
        File file1=new File(path);
        if (!file1.exists()){
            file1.mkdirs();
        }
        try {
           file.transferTo(new File(path+name));

        } catch (IOException e) {
            throw new RuntimeException(e);
        }finally {
            return R.success(name);
        }

    }
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
        FileInputStream inputStream = null;
        ServletOutputStream outputStream = null;
        response.setContentType("image/jpeg");
        try {
          inputStream=new FileInputStream(new File(path+name));
        outputStream = response.getOutputStream();
            int len=0;
            byte[] bytes= new byte[1024];
            while((len = inputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }finally {
            try {
                if(inputStream!=null){
                    inputStream.close();
                }
            } catch (IOException e) {
                throw new RuntimeException(e);
            }

                try {
                    if(outputStream!=null){
                        outputStream.close();
                    }
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
        }

    }
}
